According some authors which discuss this theme there were some factors as:
1) At the middle of 1850 the Chinese were still under British rule and the conditions were very difficult.
2) The devastation of southern Chinese by the taiping rebellion. This destroyed the rural economy and killed more than twenty millions people.
3) The gold was discovered in California in 1848. It produced a big immigrations at the final of century 17th.
Answer:
The right answer is:
e. The British started offering freedom to slaves who signed up to fight for their army.
Explanation:
In November 1775, Virginia’s British Royal Governor, Lord Dunmore, issued a proclamation in which he promised to free any slave who left his master to fight together with British forces. 300 black men had joined what Dunmore called his “Ethiopian Regiment” after just one month. Rebellious Americans feared the effects of this policy and reversed their earlier decision not to recruit African Americans into the Continental Army.
Explanation:
Andrew Jackson sought to renew a policy of political and military action for the removal of the Indians from these lands and worked toward enacting a law for Indian removal. ... The Indian Removal Act was put in place to give to the Southern states the land that belonged to the Native Americans.
C. The American Revolution